Rod cutting tool



Dec. 24, 1935.. HBLLBERG ROD CUTTING TOOL Filed May 3l., 1934 55022 Ha/B565.

Patented Dec. 24, 1935 ATENT OFFICE ROD CUT'IINGrV TOOL Bror Hillberg, Chicago,

Ill., assignor to Universal Form Clamp Company, Chicago, Ill., a corporation of Illinois Application May 31, 1934, Serial No. 728,398

3 Claims.

This invention relates to tools for cutting rods, pipes and lthe like, and has reference more particularly to that type of rody and pipe cutters wherein the cutting is effected by a plurality of 5 cutter discs grouped in a common transverse plane around the axis of a tubular body member adapted to surround the pipe or tube and Nequipped-with an operating handle for rotating or oscillating the same.

The tool of my Apresent invention has been designed more particularly for cutting the transverse tie rods of concrete forms or molds at points inwardly of the side surface of the wall or beam. In a co-pending application of MacGregor S. Anderson, Serial No. 726,639, led May 21, 1934, there is disclosed a concrete form tie rod construction wherein, by means of removable inserts or cores, there are formed recesses or cavities in the'sides'pfthe concete wall or beam around a tie rod that extends entirely through the form. These recesses or cavities are later lled by concrete plugs, but before they are so lled the tie rod is cut oif at substantially the inner ends or bottoms of the cavities so that the severed ends are covered and concealed by the plugs; and one object of the present invention is to provide a very simple and eiiicient manually operable rod cutter that may easily and quickly be applied to and removed from the rod, and that will cut the latter at a point within a recess or cavity. Another object is to provide a cutter tool of the character above indicated that can be applied to the rod sidewise of the latter, and a further object is to provide such a tool with an operating handle of such construction that it may be used to not only rotate or oscillate the tool on the rod but also to effect a gradual pinching of the cutter discs on the work as the cutting action progresses. Still other objects and advantages of the invention will be apparent to those skilled in the art from the following detailed description, taken in connection with the accompanying drawing wherein I have illustrated one practical and efficient embodiment of the principle of the invention, and in which- Fig. 1 is a fragmentary section of a concrete Wall showing a form tie rod embedded therein and extending therethrough and my improved cutting tool in working position on the rod.

Fig. 2 is a perspective view of the tool inverted relatively to its working position on the rod and showing the jaws open.

Fig. 3 is a perspective view of the tool showing the jaws closed and in Working position on the rod.

To illustrate one practical use of the tool forming the subject matter of this invention, I show in Fig. 1 a fragment C of a concrete wall or beam containing an embedded form tie rod R projecting from the sides thereof. In the sides of the 5 wall or beam are cavities I0 surrounding portions of the tie rod. The end portions of therod are cut olf substantially at the inner ends or bottoms of the cavities, and these latter are then lled by concrete plugs. The tool of the present inven- 10 tion is designed to easily and speedily effect the cutting of the rod at these points.

In the preferred form of the device illustrated in the drawing the body of the tool comprises a pair of relatively long and narrow approximately 15 semi-cylindrical jaw members II and I2, formed on one longitudinal edge with inter-tting hinge lugs I3 and I4 respectively, Ythrough which v is passed an! ordinary hinge pintle. At one end of the body member the jaws I I and I2 are suitably 20 slotted to accommodate a group of cutter wheels or discs I5 that are located in a common transverse plane. The pivot pins on which the discs I5 are mounted are secured by screws I6 so that dull cutters can be easily removed and replaced by fresh sharp cutters. At the opposite end portions of the body member, the jaws II and I2 are cast with somewhat thickened and widened portions II and I8, the free edges of which are formed with registering transverse slots I9 and 20 respectively. The outer or top surface of the thickened portion I'I of jaw II is made flat, as shown at 2 I, for a purpose later disclosed.

Pivoted in the slot 29 of the jaw I2 is a block 22 that is formed with an internally threaded hole 23. 2li designates an operating handle formed with a lower reduced and threaded end portion 25 that screws into the hole 23 of the block 22. The reduced portion 25 of the handle forms on the latter an annular shoulder 2t. On the upper end of the handle 24 is a transverse hand grip 21.

In using the tool to cut the rod R at or near the bottom of the cavity I0, the jaws are opened, as shown in Fig. 2, and the tool is applied edgewise over the rod R. The jaws are then closed on the rod until the cutters I5 engage with the surface oi the rod, and then shifted endwise along the rod to carry its cutting end into the cavity I 0. The handle 2t is then swung upwardly until its reduced portion 25 enters the slot I9, with the annular shoulder 2t slightly above the flattened surface 2I of the jaw I I. By means of the hand grip 21 the handle is given a few turns whereby the shoulder 26 is brought into clamping engagement with Lthe attened top 2I of the upper jaw II..

The 55 tool is then either rotated or oscillated, and between successive strokes it is given a turn, thereby pinching the cutters on the rod. Most conveniently the handle is given a back and forth pumping movement, and this does not dislodge the lower end of the handle from the jaw I I, since the fiattened surface 2| engaged by the annular shoulder 26 of the handle extends beyond the arc of swing of the handle, and the shoulder 26 is at all times, during the working action of the tool, in tight clamping engagement with the flattened surface 2l. A few movements of the handle suflice to cut a deep groove in the rod. VThe cutter is then removed, and the Yrod broken off by bending it up and down a few times. The tool is removed from the rod by simply backing out the handle 24 sufficiently to free the cutters from the rod, whereupon the cutter may be slid outwardly along the rod, the jaws opened, and the cutter removed.

By the use of this tool it is possible to cut a rod or pipe at a point inaccessible to ordinary pipe or rod cutters, and when the body of the tool is formed with a pair of hinged jaw members, it is possible to apply the tool sidewise to a rod or pipe Yin situations where it might be impossible to apply a cutter tool endwise over such rod or pipe. The successive pinching actions of the cutters on the rod are eifected by the same handle by which the cutting action of the tool is effected, and this conduces to simplicity of both structure and operation.

It will be understood that the structural details of the device shown may be altered or omitted Without departing from the spirit of the invention as defined by the following claims.

I claim:

1. A rod cutting tool comprising a pair of relatively long and narrow jaw members hinged to each other along one longitudinal edge, a group formed with registering transverse slots of cutter discs mounted in a commontransverse plane in one end of said jaws, and an operating handle pivotally mounted on the other end of the free longitudinal edge of one jaw and having means for clamping engagement with the corresponding end of the other jaw in the closed position of the jaws on the work.

2. A rod cutting toolcomprising a pair of relatively long and narrow jaw members hinged to each other along one longitudinal edge and 1n one end of their free edges, a group of cutter discs mountedV in a common'transverse plane in the other end of said jaws, a block pivoted in the transverse slot of oner of said jaws and formed with a threaded hole, and an operating handle formed with a threaded lower end portion screwed into said hole and engageable with the transverse slot of the other jaw, said handle having a shoulder overlapping said other jaw in the closed posi- Y tion of the jaws on the Work.

3. A rod cutting tool comprising a pair of relatively long and narrow substantially semi-cylindrical jaw members hinged to each other along one longitudinal edge and formed with register-.

ing transverse'slots in one end of their free edges, one of said jaws having a at surface intersected by one of said slots, a group of cutter discs mounted in a common transverse plane in the other end of said jaws, a block pivoted in the transverse slot of one of said jaws and formed with a threaded hole, and anV operating handle formed with a threaded lower end portion screwed into said hole and engageable with the transverse slot of the other jaw, said handle having a shoulder overlapping the said flat surface of the said other jaw in the closed position of the jaws on the work. 

